Flood monitoring over a large area for short time period using Remote Sensing (RS) and Geographical Information System (GIS) technology by disaster relief authorities have become a significant operation in the world. In this paper, an Operating Procedure (OP) for mapping flood extent and assessing flood damages have been developed which can be served as a guideline for RS and GIS operations to improve the efficiency of flood disaster monitoring and management in tropical countries like Malaysia. The flood monitoring system was developed using RADARSAT images, with its exclusive cloud penetration capability coupling with various flood disaster related parameters.

For rapid capturing of flood extent and assessing flood damage during and after flooding events, an efficient Flood Inundation Model was developed in GIS. This model integrates many types of data and multiple geo-processing tools that can automate the processes in an efficient manner. It is able to quickly determine and report the extent of flooding and the land use types under water during flooding events as well as the number of people affected in the affected built-up areas. The derived results from the whole process will provide very essential and valuable information for immediate response and assess flood, disaster relief, and damage caused by future occurring floods.